<?php
        /*
        Plugin Name: Category Posts Widget
        Plugin URI: http://jameslao.com/2011/03/24/category-posts-widget-3-2/
        Description: Adds a widget that can display posts from a single category.
        Author: James Lao
        Version: 3.3
        Author URI: http://jameslao.com/
        */

        // Register thumbnail sizes.
        if ( function_exists('add_image_size') )
        {
        $sizes = get_option('jlao_cat_post_thumb_sizes');
        if ( $sizes )
        {
        foreach ( $sizes as $id=>$size )
        add_image_size( 'cat_post_thumb_size' . $id, $size[0], $size[1], true );
        }
        }

        class CategoryPosts extends WP_Widget {

        function CategoryPosts() {
        parent::WP_Widget(false, $name='Category Posts');
        }

        /**
        * Displays category posts widget on blog.
        */
        function widget($args, $instance) {
        global $post;
        $post_old = $post; // Save the post object.

        extract( $args );

        $sizes = get_option('jlao_cat_post_thumb_sizes');

        // If not title, use the name of the category.
        if( !$instance["title"] ) {
        $category_info = get_category($instance["cat"]);
        $instance["title"] = $category_info->name;
        }

        $valid_sort_orders = array('date', 'title', 'comment_count', 'rand');
        if ( in_array($instance['sort_by'], $valid_sort_orders) ) {
        $sort_by = $instance['sort_by'];
        $sort_order = (bool) $instance['asc_sort_order'] ? 'ASC' : 'DESC';
        } else {
        // by default, display latest first
        $sort_by = 'date';
        $sort_order = 'DESC';
        }

        // Get array of post info.
        $cat_posts = new WP_Query(
        "showposts=" . $instance["num"] .
        "&cat=" . $instance["cat"] .
        "&orderby=" . $sort_by .
        "&order=" . $sort_order
        );

        // Excerpt length filter
        $new_excerpt_length = create_function('$length', "return " . $instance["excerpt_length"] . ";");
        if ( $instance["excerpt_length"] > 0 )
        add_filter('excerpt_length', $new_excerpt_length);

        echo $before_widget;

        // Widget title
        echo $before_title;
        if( $instance["title_link"] )
        echo '<a href="' . get_category_link($instance["cat"]) . '">' . $instance["title"] . '</a>';
        else
        echo $instance["title"];
        echo $after_title;

        // Post list
        echo "<ul>\n";

        while ( $cat_posts->have_posts() )
        {
        $cat_posts->the_post();
        ?>
<li class="cat-post-item">
    <a class="post-title" href="<?php the_permalink(); ?>" rel="bookmark" title="Permanent link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a>

    <?php
            if (
            function_exists('the_post_thumbnail') &&
            current_theme_supports("post-thumbnails") &&
            $instance["thumb"] &&
            has_post_thumbnail()
            ) :
            ?>
    <a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>">
        <?php the_post_thumbnail( 'cat_post_thumb_size'.$this->id ); ?>
    </a>
    <?php endif; ?>

    <?php if ( $instance['date'] ) : ?>
    <span class="post-date"><?php the_time(get_option('date_format')); ?></span>
    <?php endif; ?>

    <?php if ( $instance['excerpt'] ) : ?>
    <?php the_excerpt(); ?>
    <?php endif; ?>

    <?php if ( $instance['comment_num'] ) : ?>
    <p class="comment-num">(<?php comments_number(); ?>)</p>
    <?php endif; ?>
</li>
        <?php
                }

                echo "</ul>\n";

                echo $after_widget;

                remove_filter('excerpt_length', $new_excerpt_length);

                $post = $post_old; // Restore the post object.
                }

                /**
                * Form processing... Dead simple.
                */
                function update($new_instance, $old_instance) {
                /**
                * Save the thumbnail dimensions outside so we can
                * register the sizes easily. We have to do this
                * because the sizes must registered beforehand
                * in order for WP to hard crop images (this in
                * turn is because WP only hard crops on upload).
                * The code inside the widget is executed only when
                * the widget is shown so we register the sizes
                * outside of the widget class.
                */
                if ( function_exists('the_post_thumbnail') )
                {
                $sizes = get_option('jlao_cat_post_thumb_sizes');
                if ( !$sizes ) $sizes = array();
                $sizes[$this->id] = array($new_instance['thumb_w'], $new_instance['thumb_h']);
                update_option('jlao_cat_post_thumb_sizes', $sizes);
                }

                return $new_instance;
                }

                /**
                * The configuration form.
                */
                function form($instance) {
                ?>
<p>
<label for="<?php echo $this->get_field_id("title"); ?>">
<?php _e( 'Title' ); ?>:
<input class="widefat" id="<?php echo $this->get_field_id("title"); ?>" name="<?php echo $this->get_field_name("title"); ?>" type="text" value="<?php echo esc_attr($instance["title"]); ?>" />
</label>
        </p>

<p>
<label>
    <?php _e( 'Category' ); ?>:
    <?php wp_dropdown_categories( array( 'name' => $this->get_field_name("cat"), 'selected' => $instance["cat"] ) ); ?>
</label>
</p>

<p>
<label for="<?php echo $this->get_field_id("num"); ?>">
<?php _e('Number of posts to show'); ?>:
<input style="text-align: center;" id="<?php echo $this->get_field_id("num"); ?>" name="<?php echo $this->get_field_name("num"); ?>" type="text" value="<?php echo absint($instance["num"]); ?>" size='3' />
</label>
        </p>

<p>
<label for="<?php echo $this->get_field_id("sort_by"); ?>">
<?php _e('Sort by'); ?>:
<select id="<?php echo $this->get_field_id("sort_by"); ?>" name="<?php echo $this->get_field_name("sort_by"); ?>">
<option value="date"<?php selected( $instance["sort_by"], "date" ); ?>>Date</option>
<option value="title"<?php selected( $instance["sort_by"], "title" ); ?>>Title</option>
<option value="comment_count"<?php selected( $instance["sort_by"], "comment_count" ); ?>>Number of comments</option>
<option value="rand"<?php selected( $instance["sort_by"], "rand" ); ?>>Random</option>
        </select>
        </label>
        </p>

<p>
<label for="<?php echo $this->get_field_id("asc_sort_order"); ?>">
<input type="checkbox" class="checkbox"
       id="<?php echo $this->get_field_id("asc_sort_order"); ?>"
name="<?php echo $this->get_field_name("asc_sort_order"); ?>"
<?php checked( (bool) $instance["asc_sort_order"], true ); ?> />
<?php _e( 'Reverse sort order (ascending)' ); ?>
</label>
        </p>

<p>
<label for="<?php echo $this->get_field_id("title_link"); ?>">
<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("title_link"); ?>" name="<?php echo $this->get_field_name("title_link"); ?>"<?php checked( (bool) $instance["title_link"], true ); ?> />
<?php _e( 'Make widget title link' ); ?>
</label>
        </p>

<p>
<label for="<?php echo $this->get_field_id("excerpt"); ?>">
<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("excerpt"); ?>" name="<?php echo $this->get_field_name("excerpt"); ?>"<?php checked( (bool) $instance["excerpt"], true ); ?> />
<?php _e( 'Show post excerpt' ); ?>
</label>
        </p>

<p>
<label for="<?php echo $this->get_field_id("excerpt_length"); ?>">
<?php _e( 'Excerpt length (in words):' ); ?>
</label>
<input style="text-align: center;" type="text" id="<?php echo $this->get_field_id("excerpt_length"); ?>" name="<?php echo $this->get_field_name("excerpt_length"); ?>" value="<?php echo $instance["excerpt_length"]; ?>" size="3" />
        </p>

<p>
<label for="<?php echo $this->get_field_id("comment_num"); ?>">
<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("comment_num"); ?>" name="<?php echo $this->get_field_name("comment_num"); ?>"<?php checked( (bool) $instance["comment_num"], true ); ?> />
<?php _e( 'Show number of comments' ); ?>
</label>
        </p>

<p>
<label for="<?php echo $this->get_field_id("date"); ?>">
<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("date"); ?>" name="<?php echo $this->get_field_name("date"); ?>"<?php checked( (bool) $instance["date"], true ); ?> />
<?php _e( 'Show post date' ); ?>
</label>
        </p>

        <?php if ( function_exists('the_post_thumbnail') && current_theme_supports("post-thumbnails") ) : ?>
<p>
<label for="<?php echo $this->get_field_id("thumb"); ?>">
<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id("thumb"); ?>" name="<?php echo $this->get_field_name("thumb"); ?>"<?php checked( (bool) $instance["thumb"], true ); ?> />
<?php _e( 'Show post thumbnail' ); ?>
</label>
        </p>
<p>
<label>
    <?php _e('Thumbnail dimensions'); ?>:<br />
    <label for="<?php echo $this->get_field_id("thumb_w"); ?>">
    W: <input class="widefat" style="width:40%;" type="text" id="<?php echo $this->get_field_id("thumb_w"); ?>" name="<?php echo $this->get_field_name("thumb_w"); ?>" value="<?php echo $instance["thumb_w"]; ?>" />
</label>

<label for="<?php echo $this->get_field_id("thumb_h"); ?>">
H: <input class="widefat" style="width:40%;" type="text" id="<?php echo $this->get_field_id("thumb_h"); ?>" name="<?php echo $this->get_field_name("thumb_h"); ?>" value="<?php echo $instance["thumb_h"]; ?>" />
</label>
        </label>
        </p>
        <?php endif; ?>

        <?php

                }

                }

                add_action( 'widgets_init', create_function('', 'return register_widget("CategoryPosts");') );

                ?>
